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Home >> Toyota >> 2018 >> Prius One >> Repair and Diagnosis >> External Pages >> Different car >> Section 304 (Hybrid Battery System - Diagnostic Codes (P0ABF-P1AC4) (Lithium-Ion)) >> HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open; DTC P1AC5-13: Hybrid/EV Battery Stack 2 Current Interrupt Device Circuit Open [08/2020 - ] >> Description

DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open; DTC P1AC5-13: Hybrid/EV Battery Stack 2 Current Interrupt Device Circuit Open [08/2020 - ]: Description

WARNING: This page is about a different car, the 2022 Toyota Avalon and 2021 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

The battery ECU assembly restricts charging and discharging of the HV battery and stores a DTC when a current interrupt device (CID) located in an HV battery cell has operated and the high voltage circuit is disconnected.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1AC4-13 Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open A shut-off by a CID occurs.
(1 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly
Comes on Master Warning Light:
Comes on
P1AC5-13 Hybrid/EV Battery Stack 2 Current Interrupt Device Circuit Open A shut-off by a CID occurs.
(1 trip detection logic)
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly
Comes on Master Warning Light:
Comes on
RELATED DATA LIST

DTC No. Data List
P1AC4-13
  • Hybrid/EV Battery Cell 1 to 70 Voltage
  • Hybrid/EV Battery Cell 1 to 70 Internal Resistance
P1AC5-13